Nut lock



July 21 1929.

J. M. M' GLYNN ET AL I NUT LOCK Filed June 21, 1928 Patented July 2,1929.

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Application fled June 81, 1928. Serial Io. 287,150.

This invention relates to improvements in nut locksYit being a primaryobject of the invention to provide a nut locking devlce which willmaintain a nut locked a bolt for an indefinite period. I Other objectsrelate to a nut locklngdevlce which will reenforce the bolt to which itis applied and which may be applied-readilyand uniformly tothe bolt.

.A further object relates to the provlsion of a suitable recess betweenthe locking key and the bolt arranged to receive any displaced metalwhen threads arecut on the bolt after the key receiving slot has beenformed on the bolt. g 7 These and other objects will appear more fullyfrom the following description when considered in connection with thedrawings in which: 0 Fig. 1 is an elevational view of a bolt providedwith our invention, parts being broken away. J

Fig. 2 is a similar view showing the key bent to position to moresecurely lock the nut.

in place.

I Fig. 3 is a transverse sectiontaken on the line 3-3 ofFi 1.

' Fig.4 is a ragmenta face view of the threaded portions of the olt andkey showthereon, and

Fig. 5 is a' perspective view of the locking key. c. In carrying, outour invention we make use of abolt provided with a semi-cylindricallongitudinal recess which extends along the shankv of. the bolt andoutwardly along the inner face of the head of the bolt. The lockfjingkey'is of substantiall the same shape as v the removed metal of the'olt so as to fit snugin the slotthereof to reenforcethe same.

,. v p l 3 Fitha snug fit between the key and slot it, is

essential, particularly where inexperienced workmen are concerned,toprovide against the overhang of the threads, cut on the preformedbolt, from interfering with the assembling of'the device. This isaccomplished as setforthbelow without detracting from the inventionas anut'locking device. .We have shown our invention asapplied to*thezboltlO formed with a headed ortion 11 .and a-shank 12.;- Thebolt-is provi ed with a longitudinal slot 14 which as shown mayextenduthroughout the entire length of the bolt and toand into the head11, the head 11 havsecurely on i 14 so that the key maybe snuglyinterfitted ing the relative inclinations of the threads the threads onthe nut engage the threads of threads 16.

ing a portion of the metal adjacent theinner face thereof removed forthis purpose. The slot 14 is substantially semi-circular in crosssectionthroughout its entire len th for the purpose to be referred to below. hefree or outer end of the bolt 12 is formed with a screw-threaded portion16 of any desired length. I

It has been found that threads cut into a slotted bolt'projectsomeof-the metal of the bolt into theslot or groove during the threadcuttingoperation. In order .to overcome this difliculty, and to avoid thenecessity of a machine operation to remove theoVerhang of the threads oneach bolt, we provide a beveled portion 17 preferably extendinthroughout the entire length of the shank o the bolt, the beveledportion providing a groove 18 between the key, referred to below, andthe sides of the bolt ad'acent the slot or keyway. Un- 15 der someconditions of use we also provide a roove at the other side of thekeyway as indicated at 18 in Fig. 3although ordinarily one such grooveis suflicient. 5 v

The not locking device comprises a key 20 formed of relatively strongmetal, such "for example as steel, and of a cross-sectioncorresponding-substantially with that of the slot within the slot. Theexterior rtion of-the key lies substantially flush wit the exterior ofthe shank 12 and is provided with a screwthreaded portion 22, thethreads of which may be arranged at a slight a e with respect to thethreads 16 of the or the purpose of wedging the threads of lthe'bolt-and nut in tight contact. Onesxid ofthekey is bent asat 21 to fitwithinijthe slot in the head 11,

the other. end beingifoxmed with a flat surface 23 formed by theremovalof portions of the threads thereof ,so. as to facihtate'the introductionof the nut- 24 onto the bolt and to cause proper adjustment of the partswhen the ke In the formation of the above devices the bolt may be moldedor stamped for the'formation of the longitudinal slot and thereaftermachined and screw-threaded ready for use.

The key 20 is likewise molded or stamped into substantiall the sameshape. as the slot 14 with the t reads '22, inclined; if desired, formedto be positioned adjacent the screw- Inattaching the device the'key maybe readily inserted in the slot in the bolt overhang of the threads cutin the bolt will be accommodated by the groove 18 or 18' withoutinterfering with t e positioning of the key. The nut 24 is easilyscrewed onto the threads 16 up to the point of engagement of the threadsof the nut with the threads 22 of the key 20. Thereafter, by the use ofa suitable wrench, the nut is drawn up to the desired degree oftightness. After the nut has reached the threaded portion 22 of the key'the key is pressed tightly into the slot 14 so that the key reenforcsthe shank of the bolt and due to the semi-circular configuration of thekey and slot the key will be fitted nicely with- Y in the slot.

When the nut has been screwed up firmly against the devices interveningbetween the head 11 and nut 24, the engagement of such devices with theangular portion 21 of the key presses the same firmly intothe groove inI the head 11 and in this way the threads 22, by

V No. 1,5 64,70.0, patented December 8, 1925.

Having now claim: f

1. Ina nut lock and'in combination, a screwthreaded bolt having a slot Itudinally of. the shank thereof, a key snugly described our invention weinterfitted within said slot and having a portion-exposed adjacent theouter surface of said shank, said shank andkey being separated adjacentthe exposed surface thereof to provide a longitudinal slot therebetweenad a-' cent said screw-threaded portion anda screwthreaded nut adaptedfor engagement with the screw threads of said bolt and to extend overand engage said exposed portion of said key for locking saidnutin'position. 1

formed with a slot extending longitudinally of the shank thereof, a nutlocking key interfitted snugly within said slot, said slotbeing formedwith a beveled edge adjacent said screw-threaded-portion spacing theside edgeof said slot from said key and a Screw-thread ed nut ada tedfor engagement with the screw threads 0 said bolt and to extend over andEngage said keyfor locking said nut in posi- 3. In a formed with a slotof general semi-cylindrical form extending longitudinally .of the shankthereof, a nut locking key interfitted n snu ygzithin said slot, sai dslot being formed wit a beveled edge adjacent saidscrewas any.

extending longinut 1ock, a screw-threaded bolt.

threaded portion spacing the side edge of said slot from said key and ascrew-threaded nut adapted for engagement with the screw threads of saidbolt and to extend over and engage said key for locking said nut inposition. 3

4. In 'a nut lock, a screw-threaded ,bolt

formed with a slot extending longitudinally of the. shank thereof, a nutlocking key interfitted snugly within said slot and provided with athreaded portion exposed adjacent the threads of said bolt, said slotbeing formed I 1 with a beveled edge adjacent said screwthreaded portionspacing the side edge of said slot from said key and a screw-threadednut adapted for engagement with the screw threads-of said bolt and toextend over and engage the exposed threaded portion of said key forlocking said nut in position.

5. In a nut lock, a screw-threaded bolt formed with a slot, extendinglongitudinally of the shank thereof, a nut. locking key interfittedsnugly within said slot and provided with a-threaded portionexposed'adjacent the threads of said bolt, said slot-being formed with abeveled edge adjacent said screwthreaded'portion spacing the side edgeof said slot from said key, said key being formed with an inclinedportion adjacent the outer end thereof for the purpose of reducin theradial 'length of the combined bolt and key at this threads of said boltand to extend over and en age-the threaded portion of said key for locing said nut in position.

6. A bolt comprising a shank havinga screw-threaded portion and a head,a'longitudinal slot in said shank adapted to receive a locking "key,said slot terminating adjacent one side thereof in an outwardly inclinedbeveled edge extending throughout the length of the screw-threadedportion thereof.

7. In a nut lock, a screw-threaded, headed bolt formed with a slotextending longitudi nally of the shank thereof and constructed for beingreceived within an apertured article,

7 H I said slot extending to and'into said head and 2. In a nut lock, ascrew-threaded bolt outwardly alongtheinner face of said head as asurface depression, a nut locking key interfitted'snuglywithin said slotand extended outwardly in theslot in said head and aunt adapted toengage the screw-threaded por-.

tion of said bolt and to extend over and engage sald key for'compressingsaid key into the depression in saidhead by pressure against.county. of Queens, State of New York, this 12th day of June, 1928'JQIIN MICHAEL IcGLYNN.

